Deionization equipment

Abstract

The utility model discloses deionizing equipment which is used for purifying raw water and relates to the technical field of sewage treatment. Comprising a sedimentation tank for coagulating suspended matters, an air floatation device for floating the suspended matters, a filtering device for removing the suspended matters and grease, an ultrafiltration device provided with a pressurized film, a reverse osmosis device for removing inorganic salts and organic matters, and EDI equipment for directionally migrating ions, which are arranged in sequence, wherein the sedimentation tank, the air floatation device, the filtering device, the ultrafiltration device, the reverse osmosis device and the EDI equipment are arranged in sequence; the sedimentation tank comprises a flocculation zone for discharging raw water and a water distribution zone for diluting the raw water passing through the flocculation zone, the flocculation zone is provided with a first dosing tank and a first concentration detector, and the water distribution zone is provided with a first valve and a second concentration detector; the first dosing tank, the first concentration detector, the second concentration detector and the first valve are electrically connected with the central control system, so that sewage and direct drainage can be deeply treated, and the purposes of recycling and saving water resources are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a deionization device. Background Art

[0002] A heat exchanger is an energy-saving device used to transfer heat between fluids at different temperatures. It transfers heat from a fluid with a higher temperature to a fluid with a lower temperature so that the fluid temperature reaches the specified index of the process to meet the needs of process conditions. It is also one of the main equipment for improving energy utilization.

[0003] Plate-fin heat exchangers require a large amount of water resources in each link of parts production, cleaning, assembly, factory pressure testing, etc. Some of the water can be recycled after use, but most of the water is sewage containing various chemical residues (including but not limited to pressure test water, rinsing water and pipe treatment water), which cannot be recycled or discharged directly. It is necessary to deeply treat the sewage and direct discharge.

[0004] Therefore, how to deeply treat sewage and direct drainage to achieve the purpose of recycling and saving water resources is a technical problem that technicians in this field currently need to solve. Utility Model Content

[0005] The utility model aims to provide a deionization device, which can deeply treat sewage and direct drainage, thereby achieving the purpose of recycling and saving water resources.

[0006] To achieve the above-mentioned purpose, the utility model provides a deionization device for raw water purification, comprising a sedimentation tank for suspended matter coagulation, an air flotation device for suspended matter floating, a filtering device for removing suspended matter and grease, an ultrafiltration device with a pressurized membrane, a reverse osmosis device for removing inorganic salts and organic matter, and an EDI device for directional migration of ions, which are arranged in sequence;

[0007] The sedimentation tank includes a flocculation area for discharging raw water and a water distribution area for diluting the raw water after the flocculation area. The flocculation area is provided with a first drug adding box and a first concentration detector, and the water distribution area is provided with a first valve and a second concentration detector. The first drug adding box, the first concentration detector, the second concentration detector and the first valve are all electrically connected to the central control system.

[0008] Preferably, the sedimentation tank further comprises:

[0009] a sludge collection area, adjacent to the water distribution area, for collecting sediment from the water distribution area;

[0010] The clean water area is adjacent to the water distribution area and is provided with an inclined plate area for raw water circulation between the water distribution area and the water distribution area. The inclined plate area includes a plurality of inclined plates arranged at an angle to the horizontal plane so that the raw water flows along the bottom of the inclined plates to the clean water area;

[0011] The water outlet area is connected to the clean water area through a plurality of through holes, and is also connected to a water outlet trough, and the water outlet trough is provided with a water outlet pipe connected to the air flotation device.

[0012] Preferably, the air flotation device comprises:

[0013] The second dosing box is connected to the central control system and is used to condense the suspended solids in the raw water after passing through the outlet tank;

[0014] The flotation tank, the bottom of which is used to discharge air bubbles that can attach to suspended matter;

[0015] A scraper device is installed on the top of the flotation tank and is provided with a number of scrapers for collecting suspended matter;

[0016] The water production tank is adjacent to the flotation tank and is used for raw water to flow in along the top of the flotation tank.

[0017] Preferably, the filtering device includes a fiber ball filter and a laminated filter which are connected to each other, the water production tank is provided with a first pump body for the raw water from the water production tank to enter the fiber ball filter, the laminated filter is connected to the ultrafiltration device, and the ultrafiltration device is provided with a second valve for controlling the flow of raw water, a float flowmeter for detecting the flow of raw water and a second pump body for the raw water to enter the reverse osmosis device.

[0018] Preferably, the reverse osmosis device comprises a primary reverse osmosis device, a secondary reverse osmosis device and a third pump body, the third pump body is used to transport raw water passing through the primary reverse osmosis device to the secondary reverse osmosis device, and the secondary reverse osmosis device is connected to the EDI device.

[0019] Preferably, the inclined plate is connected to a servo motor for driving the inclined plate to rotate relative to the clean water area, the angle between the inclined plate and the horizontal plane is 55-65°, and the end of the inclined plate close to the clean water area is lower than the end of the inclined plate close to the water distribution area.

[0020] Preferably, there are a plurality of through holes, all of which are arranged at intervals and have circular cross-sections perpendicular to their axes.

[0021] Preferably, the mud accumulation area is connected to the mud discharge ditch through a mud discharge pipe, and a third valve is provided on the mud discharge pipe to control the sediment flow to the mud discharge ditch.

[0022] Preferably, the water outlet area is provided with a first water level detector, the water outlet tank is provided with a second water level detector, and both the first water level detector and the second water level detector are electrically connected to the central control system.

[0023] Preferably, the first medicine adding box and the second medicine adding box are both provided with polyaluminium chloride agent and polyacrylamide agent.

[0024] Compared with the above-mentioned background technology, the deionization equipment provided by the utility model is used for raw water purification, including a sedimentation tank for suspended matter coagulation, a flotation device for suspended matter floating, a filtration device for removing suspended matter and grease, an ultrafiltration device provided with a pressurized membrane, a reverse osmosis device for removing inorganic salts and organic matter, and an EDI device for directional migration of ions, which are arranged in sequence; the sedimentation tank includes a flocculation zone for raw water discharge and a water distribution zone for diluting the raw water after the flocculation zone, the flocculation zone is provided with a first drug adding box and a first concentration detector, the water distribution zone is provided with a first valve and a second concentration detector, and the first drug adding box, the first concentration detector, the second concentration detector and the first valve are all electrically connected to the central control system.

[0025] In the pretreatment stage, the raw water is discharged into the raw water pool and then into the sedimentation tank. When the first concentration detector detects that the raw water concentration exceeds the first preset value, the control system controls the drug adding box to add drugs to the raw water for suspended matter coagulation. Then the raw water flows into the water distribution area. When the second concentration detector detects that the raw water concentration in the water distribution area is greater than the second preset value, the control system controls the first valve to open and introduce water to dilute the raw water. Then the raw water is sequentially passed through the flotation device and the filtration device to remove suspended matter and grease. In the deep treatment stage, the raw water after the pretreatment stage enters the ultrafiltration device and the reverse osmosis device to remove inorganic salts, organic matter, etc., and then the raw water is purified by the EDI equipment. Through the setting of the central control system, the deionization equipment automatically completes the whole process of water treatment, which can perform deep treatment on sewage and direct drainage, thereby achieving the purpose of recycling and saving water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of a sedimentation tank provided by an embodiment of the utility model;

[0028] Figure 2 A schematic diagram of the structure of the air flotation device provided in an embodiment of the utility model;

[0029] Figure 3 A schematic diagram of the structure of a fiber ball filter provided by an embodiment of the utility model;

[0030] Figure 4 A schematic diagram of the structure of a laminated filter provided by an embodiment of the utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the ultrafiltration device provided in an embodiment of the utility model.

[0032] in:

[0033] 11-flocculation area, 12-water distribution area, 13-mud accumulation area, 131-mud discharge pipe, 132-mud discharge ditch, 133-third valve, 14-clear water area, 15-inclined plate area, 16-water outlet area, 161-first water level detector, 17-through hole, 18-water outlet trough, 181-second water level detector, 19-water outlet pipe;

[0034] 21-air flotation tank, 22-foam scraping device, 23-scraper, 24-water production tank;

[0035] 31-fiber ball filter, 32-laminated filter, 321-piston cap, 322-filter cartridge, 323-laminated; 4-ultrafiltration device. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] In the description of the present invention, it should be understood that the terms "top" and "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the position or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation of the present invention.

[0039] The utility model aims to provide a deionization device, which can deeply treat sewage and direct drainage, thereby achieving the purpose of recycling and saving water resources.

[0040] See also Figure 1 To achieve the above-mentioned purpose, the utility model provides a deionization device for raw water purification, including a sedimentation tank for suspended matter coagulation, an air flotation device for suspended matter floating, a filtering device for removing suspended matter and grease, an ultrafiltration device 4 provided with a pressurized membrane, a reverse osmosis device for removing inorganic salts and organic matter, and an EDI device for directional migration of ions.

[0041] Among them, the reverse osmosis device can remove most of the inorganic salts and almost all organic matter and microorganisms (bacteria, heat sources, etc.), thereby ensuring the high quality of the raw water passing through it; part of the water discharged from the reverse osmosis device flows to the desalted water tank, and the other part is collected by the pipeline and flows back to the inlet of the reverse osmosis device for secondary reverse osmosis treatment.

[0042] It should be noted that EDI equipment is a fusion of electrodialysis and ion exchange technology. Through the selective permeability of cations and anions by cation exchange membranes and the exchange of ions by ion exchange resins, directional migration of ions is achieved under the action of a DC electric field, thereby completing the deep desalination of raw water. At the same time, the hydrogen ions and hydroxide ions produced by electrolysis of the raw water regenerate the ion exchange resin, thereby achieving continuous production of desalted water.

[0043] The sedimentation tank includes a flocculation area 11 for discharging raw water and a water distribution area 12 for diluting the raw water after passing through the flocculation area 11. The flocculation area 11 is provided with a first drug adding box and a first concentration detector, and the water distribution area 12 is provided with a first valve and a second concentration detector. The first drug adding box, the first concentration detector, the second concentration detector and the first valve are all electrically connected to the central control system, and the first drug adding box is provided with polyaluminum chloride agent and polyacrylamide agent.

[0044] It should be noted that the polyaluminium chloride agent and polyacrylamide agent added through the first dosing box can be fully mixed with the suspended matter in the raw water, causing the small particles of suspended matter in the raw water to condense and generate large particles of flocs for subsequent filtration and removal.

[0045] In the pretreatment stage, the raw water is discharged into the raw water pool and then into the sedimentation tank. When the first concentration detector detects that the raw water concentration exceeds the first preset value, the control system controls the drug adding box to add drugs into the raw water for suspended matter coagulation. Then the raw water flows into the water distribution area 12. When the second concentration detector detects that the raw water concentration in the water distribution area 12 is greater than the second preset value, the control system controls the first valve to open and water to dilute the raw water. Then the raw water passes through the flotation device and the filtration device in turn to remove suspended matter and grease.

[0046] In the deep treatment stage, the raw water from the pretreatment stage enters the ultrafiltration device 4 and the reverse osmosis device to remove inorganic salts, organic matter, etc., and then the raw water is purified by the EDI equipment. Through the setting of the central control system, the deionization equipment automatically completes the whole process of water treatment, and can deeply treat sewage and direct drainage, thereby achieving the purpose of recycling and saving water resources. At the same time, it has the advantages of simple operation, high efficiency, high precision and high quality.

[0047] Preferably, the sedimentation tank also includes a mud accumulation area 13, a clear water area 14 and a water outlet area 16. The mud accumulation area 13 is adjacent to the water distribution area 12 and is used to collect sediment in the water distribution area 12. The mud accumulation area 13 is connected to the mud discharge ditch 132 through a mud discharge pipe 131. A third valve 133 is provided on the mud discharge pipe 131. When the amount of sediment accumulated in the mud accumulation area 13 is greater than a third preset value, the central control system can control the third valve 133 to open for the sediment to flow to the mud discharge ditch 132. In addition, the third valve 133 can also be opened for a certain period of time to clean up the sediment. For example, the third valve 133 can be opened for two hours at a time and opened once a week.

[0048] The clean water area 14 is adjacent to the water distribution area 12 and is provided with an inclined plate area 15 for raw water circulation between the clean water area 14 and the water distribution area 12. The inclined plate area 15 includes a plurality of inclined plates arranged at an angle to the horizontal plane so that the raw water flows along the bottom of the inclined plate to the clean water area 14; preferably, the inclined plate is connected to a servo motor, which can drive the inclined plate to rotate relative to the clean water area 14 through the servo motor to change the angle between the inclined plate and the horizontal plane. The angle between the inclined plate and the horizontal plane is preferably 55-65°, and the end of the inclined plate close to the clean water area 14 is lower than the end of the inclined plate close to the water distribution area 12.

[0049] The water outlet area 16 is connected to the clean water area 14 through a plurality of through holes 17. The through holes 17 are preferably multiple, and all the through holes 17 are arranged at intervals and the cross-section perpendicular to their own axes is preferably circular. The water outlet area 16 is also connected to a water outlet trough 18. The water outlet trough 18 is provided with a water outlet pipe 19 connected to the air flotation device. The water outlet area 16 is provided with a first water level detector 161, and the water outlet trough 18 is provided with a second water level detector 181. The first water level detector 161 and the second water level detector 181 are both electrically connected to the central control system. When the raw water level in the water outlet area 16 and / or the water outlet trough 18 is too high, the water injection amount for diluting the raw water in the water distribution area 12 is controlled by the central control system to avoid overflow of raw water in the water outlet area 16 and / or the water outlet trough 18.

[0050] See also Figure 2 Preferably, the flotation device includes a second dosing box, a flotation tank 21, a scraper device 22 and a water production tank 24. The second dosing box is connected to the central control system. The second dosing box is provided with a polyaluminum chloride agent and a polyacrylamide agent, which can be fully mixed with the suspended matter in the raw water again, so that the small particles of suspended matter in the raw water are condensed again to form large particles of floccules for subsequent filtration and removal; the bottom of the flotation tank 21 is used to discharge bubbles that can attach to the suspended matter, and the buoyancy of the suspended matter is increased by the attachment of a number of bubbles; the scraper device 22 is arranged on the top of the flotation tank 21, and the scraper device 22 is provided with a number of scrapers 23 for collecting suspended matter; the water production tank 24 is adjacent to the flotation tank 21, and is used for raw water to flow in along the top of the flotation tank 21.

[0051] See also Figures 3 to 5In this embodiment, the filtering device includes a fiber ball filter 31 and a laminated filter 32 that are connected to each other. The water production tank 24 is provided with a first pump body for the raw water from the water production tank 24 to enter the fiber ball filter 31. The fiber ball filter 31 filters the suspended matter and grease in the raw water to reduce the operating pressure of the subsequent system. After that, the raw water passes through the laminated filter 32 to remove the mechanical particle impurities leaked when the fiber ball filter 31 discharges the raw water, thereby ensuring the cleanliness of the raw water after the filtering device and preventing damage to the ultrafiltration membrane in the subsequent ultrafiltration device 4. The laminated filter 32 is provided with a filter column 322 and a laminate 323 for raw water filtration. The laminated filter 32 is also provided with a piston cap 321 that can move relative to the laminate 323. The ultrafiltration device 4 has a total of 6 sets, each containing 50m 2 The ultrafiltration membrane is composed of an ultrafiltration membrane assembly, a matching second valve and a corresponding piping system. The ultrafiltration membrane assembly preferably adopts an external pressure ultrafiltration membrane assembly. The ultrafiltration device 4 is provided with 5 pneumatic valves (respectively controlling water inlet, water production, backwash water inlet, backwash discharge and unqualified water circulation), two float flowmeters for detecting the raw water flow rate and a second pump body for raw water to enter the reverse osmosis device, ensuring the long-term safe and stable operation of subsequent equipment such as reverse osmosis.

[0052] Among them, the reverse osmosis device includes a primary reverse osmosis device, a secondary reverse osmosis device and a third pump body. The raw water in the ultrafiltration water tank of the ultrafiltration device 4 is driven by the second pump body to flow down to the primary reverse osmosis device for reverse osmosis treatment. The third pump body is used to transport the raw water through the primary reverse osmosis device to the secondary reverse osmosis device for secondary purification. After that, the raw water treated by the secondary reverse osmosis device is driven by the EDI water supply pump to flow to the EDI equipment for further purification. Finally, the raw water produced by the EDI equipment is qualified water for use in the workshop.

[0053] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0054] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0055] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the utility model.

Claims

1. A deionization device for raw water purification, characterized in that: It comprises a sedimentation tank for flocculation of suspended matter, an air flotation device for floating suspended matter, a filtering device for removing suspended matter and grease, an ultrafiltration device (4) provided with a pressurized membrane, a reverse osmosis device for removing inorganic salts and organic matter, and an EDI device for directional migration of ions. The sedimentation tank comprises a flocculation area (11) for discharging raw water and a water distribution area (12) for diluting the raw water after passing through the flocculation area (11); the flocculation area (11) is provided with a first drug adding box and a first concentration detector; the water distribution area (12) is provided with a first valve and a second concentration detector; the first drug adding box, the first concentration detector, the second concentration detector and the first valve are all electrically connected to a central control system.

2. The deionization device according to claim 1, characterized in that: The sedimentation tank also includes: a mud accumulation area (13), adjacent to the water distribution area (12), for collecting sediment in the water distribution area (12); A clean water area (14), adjacent to the water distribution area (12) and provided with an inclined plate area (15) for raw water circulation between the water distribution area (12), the inclined plate area (15) comprising a plurality of inclined plates arranged at an angle to a horizontal plane, so that raw water flows along the bottom of the inclined plates to the clean water area (14); The water outlet area (16) is connected to the clean water area (14) through a plurality of through holes (17). The water outlet area (16) is also connected to a water outlet trough (18). The water outlet trough (18) is provided with a water outlet pipe (19) connected to the air flotation device.

3. The deionization device according to claim 2, characterized in that: The air flotation device comprises: A second drug adding box, connected to the central control system, for condensing suspended matter in the raw water after passing through the water outlet tank (18); An air flotation tank (21) having a bottom for discharging air bubbles that can attach to suspended matter; A froth scraping device (22) is arranged on the top of the flotation tank (21) and is provided with a plurality of scrapers (23) for collecting suspended matter; The water production tank (24) is adjacent to the flotation tank (21) and is used for raw water to flow in along the top of the flotation tank (21).

4. The deionization device according to claim 3, characterized in that: The filtering device comprises a fiber ball filter (31) and a laminated filter (32) which are connected to each other. The water production tank (24) is provided with a first pump body for allowing raw water from the water production tank (24) to enter the fiber ball filter (31). The laminated filter (32) is connected to the ultrafiltration device (4). The ultrafiltration device (4) is provided with a second valve for controlling the flow of raw water, a float flowmeter for detecting the flow of raw water, and a second pump body for allowing raw water to enter the reverse osmosis device.

5. The deionization device according to claim 4, characterized in that: The reverse osmosis device includes a primary reverse osmosis device, a secondary reverse osmosis device and a third pump body. The third pump body is used to transport raw water passing through the primary reverse osmosis device to the secondary reverse osmosis device. The secondary reverse osmosis device is connected to the EDI device.

6. The deionization device according to claim 2, characterized in that: The inclined plate is connected to a servo motor for driving the inclined plate to rotate relative to the clean water area (14); the angle between the inclined plate and the horizontal plane is 55-65°, and one end of the inclined plate close to the clean water area (14) is lower than one end of the inclined plate close to the water distribution area (12).

7. The deionization device according to claim 2, characterized in that: There are a plurality of through holes (17), all of which are arranged at intervals and have circular cross-sections perpendicular to their axes.

8. The deionization device according to claim 2, characterized in that: The mud accumulation area (13) is connected to the mud discharge ditch (132) through a mud discharge pipe (131), and a third valve (133) is provided on the mud discharge pipe (131) for controlling the sediment flow to the mud discharge ditch (132).

9. The deionization device according to claim 2, characterized in that: The water outlet area (16) is provided with a first water level detector (161), the water outlet tank (18) is provided with a second water level detector (181), and both the first water level detector (161) and the second water level detector (181) are electrically connected to the central control system.

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